Grumpstep 

A musical sub-genre that consists of (normally) electronic remixes of audio clips from a famed Youtube channel, Game Grumps. Such songs include "Goof Troop Boof", "Banana Shoes", "BaBoom", and "Ice Hair".

Dude 1: Aw, man! Did you hear that Grumpstep song by xXJerryTerryXx?

Dude 2: Which one? Banana Shoes?

Dude 1: Yeah! I had that song stuck in my head for a whole week!

Grumpstep by Random_Grumpling November 11, 2012

dropping a grumpy 

A polite way of saying that you’re shitting a massive turd. One of which causes you to make an angry face.

After eating that second helping on taco Tuesday, Jeff was in the bathroom for a good hour dropping a grumpy.

dropping a grumpy by anonymous July 1, 2021

Grum Moment 

When you screw up really badly, ultimately misrepresenting the people you work for.

"Hey Jackson, no rape in the office!"
"Sorry sir, I had a Grum moment"

Grum Moment by 5#!7 August 17, 2014

Game Grumps 

A let’s play YouTube channel staring Arin “Egoraptor” Hanson and Danny “Sexbang” Avidan. Their episodes often involving silly voices, jokes, running gags, making fun of games (typically Sonic the Hedgehog) and insightful advice and life stories. Also shows by the name of Steam Train, Grumpcade and Steam Rolled appear in the channel, although not as frequent, it is also expected for the channel to have various random segments every now and then.

Do you watch Game Grumps?
Who?
You know the let’s play duo involving that one animator and musician?
Nope.
The two dudes who could be in a Pantene commercial .
OH, GAME GRUMPS

Game Grumps by NotEditedbyMattandRyan February 7, 2018

grumptard 

A grumpy and retarded person

Channa says Peter is a grumptard all the time

grumptard by PitaBread January 20, 2008

Dump a grumpy. 

To defecate.

Every morning I dump a grumpy.

Dump a grumpy. by Archibald H. Wigglesworth December 17, 2008

take a grumpy 

The act of having a bowel movement.

You better pull over, I need to take a grumpy.

take a grumpy by mangus May 24, 2004